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Laser wavelength metrology with color sensor chips.

Tyler B Jones, Nils Otterstrom, Jarom Jackson

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    |December 25, 2015
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    Summary

    We developed a low-cost laser wavelength meter using a commercial color sensor. This device achieves picometer-level precision, offering a cost-effective solution for precise wavelength measurements.

    Area of Science:

    • Optics and Photonics
    • Sensor Technology

    Background:

    • Precise laser wavelength measurement is crucial for various scientific and industrial applications.
    • Existing wavelength meters can be expensive and complex.

    Purpose of the Study:

    • To develop a novel, cost-effective laser wavelength meter.
    • To evaluate the precision and stability of the developed device.

    Main Methods:

    • Utilized a commercial color sensor chip with an array of photodiodes and absorptive color filters.
    • Determined light wavelength by comparing relative photodiode amplitudes.
    • Incorporated etalon effects to enhance spectral features and improve precision.

    Main Results:

    • The developed wavelength meter demonstrated picometer-level precision.

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  • The device exhibited picometer-scale drift over a period exceeding one month.
  • Measurements showed excellent agreement with a commercial wavelength meter and an atomic reference.

    • Conclusions:

    • A low-cost, high-precision laser wavelength meter can be realized using a commercial color sensor.
    • The device offers a viable alternative to expensive commercial wavelength meters.
    • The technology shows potential for widespread adoption in spectroscopy and laser systems.